Bis(bicyclo-[2.2.1]hept-5-ene-2-carboxyl-ato)-1κO,O';4κO,O'-di-μ(2)-chlorido-1:2κCl;3:4κCl-octa-methyl-1κC,2κC,3κC,4κC-di-μ(3)-oxido-1:2:3κO;2:3:4κO-tetra-tin(IV)

In the title compound, [Sn(4)(CH(3))(8)(C(8)H(9)O(2))(2)Cl(2)O(2)], the tetra-nuclear complex mol-ecule has crystallographically imposed inversion symmetry. The coordination polyhedron about the two central Sn atoms is distorted trigonal-bipyramidal, whilst the two peripheral metal atoms bonded to the carboxyl-ate groups have a distorted octa-hedral coordination geometry. In the crystal, mol-ecules are connected by long Sn⋯O contacts [3.139 (11) Å], forming chains along [011].